Papermaking machine and method



March 19, i946. l E. E. BEFRY 2,396,596

PAPER MAKING MACHINE AND METHOD originl Filed May 31, 1941 ments together with means for supplying stock or board.

Patented Mar. 19 1946 Wilma E.

tion of Wisconsin Berry, executrix,

orlto Beloit Iron VWorks',` Beloit, Wis., a corpora- Original application May 31, 1941, Serial No. 396,066.- Divided and this application February 25, 1944, Serial No. 523,806

, 12 Claims.l This invention relates to paper making ma chinery wherein separate stock chambers com-v municatel with a forming surface and flow stock in different directions onto the forming surface.

Specically the Vinvention relates to a. cylinder type paper making machine including spaced opposed cylinder molds and formation zones on nonadjacent sides of the cylinder molds equipped with partition zones providing isolated compartto these compartments so that the stock will ow along the lengths of the cylinder molds from some of the compartmentsad radially onto the cylinder molds from other compartments.

The invention includes a method of making paper having improved fiber formation characteristics. l v I This` application is a division .of the J'ohn E, Goodwillie and Earl E.` Berry applicationentitled: Cylinder type paper making machines, Serial 396,066, viiled May 31,1941. K

In accordance with this invention, a plurality of cylinder molds are arranged with a pair of transfer rolls or couch rolls defining a nip receiving the web from each mold therebetween to consolidate the webs. into `a single laminated sheet or board. A l Ina preferred embodiment ofthe invention a pair: of opposed oppositely rotating cylinder 30 molds are mounted in the same vat to deliver their webs to separate felts trained throughthe nips provided by the couch rolls cooperating with the top of each'cylinder mold. These couch rolls, in turn, cooperate with each other to define a common nip for both feltsand webs. The felts are directed around their respective couch rolls to bring the wire sides of the webs together`an d, as the webs pass through this common nip, they are pressed together to form a laminated sheet The nips between the cylinder molds and the couch rolls, together with the common nip between the couch rolls, seal off the space between i the cylinder molds vthrough which the exposed forming surfaces must pass after delivering their webs to the felts. This facilitates the maintenance of vacuum within the molds.

The cylinder Vmolds are` equipped with formation zones on the nonadjacent sides-thereof, and 5,0 each formation zone is divided into three superimposedparts. The lower part of each zone receives stock flowing across the length of the cylr inder mold in one direction. 'I'he top part ref. ceives stock ilowing `in the opposite direction.

Adifferent streams of stock. I

Otherand further objects ofthe invention will The middle part receives stock directly from the head box to ilow radially onto the vide cylinder-type paper making web-forming zones having diierent stock. areas.

equipped with means'for flowing the stock inopposite directions across the width of the forming surface in some of said chambers as well asv means for owing stock directly onto the form'- ing surface from other of said chambers.

A still further V,object of the invention is to providea cy1inder-type paper making machine with a localized formation zone containing a plu. rality of stock chambers in which stock can be circulated to produce desired fiber formations on the cylinder mold.

A still further object of the invention is to provide a cylinder-type paper making machine with three superimposed stock chambers having open ends kdirectly communicating with the cylinder molds, together with meansfor flowing stock in opposite directions through the top vand bottom chambers along the lengths of the cylinder molds,

and means for flowing stock through the middl chamber radially ontov the cylinder molds.

' A still further object of the invention is to proA vide a process of making paper with improved fiber. formation characteristics produced from be apparent to those skilled in the art from the l:following detailed description of the annexed .Y Ysheet of drawingsV which,`by way of preferred example only,y illustrates one embodiment of the invention.,

- On the drawing:

Figure 1 is a vertical cross-sectional view of a. cylinder-type paper making machine having forming zones for the cylinder molds dividedinto `a plurality -of parts or compartments receiving Vstock flowing in different directions.

lFigure 2 is a fragmentary top plan machine shown in Figure '1.,v l l '.As shown in 'Figure 1, thev cylinder molds ,20 and 2l, together with cooperating couch rolls 32 and 33, are rotatably. mounted in a'vat-like structure havingv a drain outlet IGI inthe bottom thereof. The couch rolls 32 and 33 cooperate with the cylinder molds 270 and il` respectively to define transfer nips. Bland y35 at the toppertions of..the molds for effecting transfer ortthe Y cylinder mold. It is, then, an object of this invention t0 D170- machines with view of the and travels over the roll 33.

Y thereof toward the pipe |93'. n y

' directions. through the chambers from 'the largeinlet ends thereof to the small outlet `ends thereof, and excess stock is removed v K top .and bottom compartments Yfof each formation chamber vhave streams of stock flowing in opposite directions-therethrough along webs on the molds to pick-up felts` 36 and 61 respectively. As shown, the pick-up felt 36 is directed over the top of the mold 26 and around the couch roll 32. The felt 31 has a similar path mold 2| around the couch The couch rolls 32 and 63 have a common nip 52 therebetween receiving the felts 36 and 31 together with the brouswebs 4carriedV by theielts. The mold-engaging sides of the fibrous webs are thus brought together by the felts 66 and 31 in the common nip 62 to form` a laminated v sheet.

Feed boxes m and les are pmv'idedzat each end. of the vat |60 and definepassages|64.and:fl

|66 respectively receiving stock from inlet headers |66 and |61.` headers |66 and |61a respectively and the full width of the passageways by means of a plurality of branch pipes such as H56v and |69 connecting the headers with the bottom portions `of the passageways |64and |65 along 'the entire lengths orth'ese passages.

Enlarged head boxes |1||`and I1|1 are provided The stock is received into Ithe |61 from reedpipes |6611 and is then distributed across at the tops orthe passageways |64and |65 re-.

spectively'., .Y

Formation chambers designatedA generally by the reference numerals |14 andf|15are provided for the cylinder molds'f2ll and 2|. respectively. These formation -chambers |14 and* |15 are dividedinto three compartmentszincluding bottom compartments |14a and |1 5a, middle compartments |14b and |15b, and top compartments |14c and |16c. The head boxes rectly with the middle; compartments |1411 and |1511 respectively and the top andbottom walls ofl thesej middle compartments carryslices |66 and |9| respectively-extending'iromthe ends the cylinder molds to better isolate the compartments. flhe bottom 'compartmentsiua and l|15a taper in `size across the width or the chamber, being larger 'at one end 'than at-the'other end thereof. 'The top compartments |14c and |15c :taper in theopposite direction asbest shown in Figure 2.

l`Theheaders |66 and |61, asbest shown at |66 in Figure `2, `have the |6111 `cormm'micating with the midportions thereof', and endppes |62 and |63'extend from theends ofthe headersto pumps |94 and |95. 'llle'spvmpsgare motors' such as |16 and` |1| communicate di- 14c. The pump through Aa valved |65. communicates spectively. ber is connected through a vaived pipe-|99 the pipe |92. .The small |140 is connected through a valved pipe 260 with Thus stock is 'flowed in opposite |14a and |14c from these outlet ends through the pipes |99 and 206 back to the pipes pumps and pipe connections are provided Vfor the lAs a`result,the

the full lengths of the' cylinder molds. The=in termediate VVr lmiddle compartments |14b andvdrivenin'dividually by means of' .valved pipe |61 'with' the top 4|92 `and |33. Similar.

1 lower portions, |64 and |65 Y l Vao vvchambers is contrlled bythe speeds for lthe pumps and the settings of pipes.l 1

By this arrangement, it is possible to obtain a sheet arrangement -on each cylinder mold with the ilbers lying at reversedangles to the lengthwise direction ofthe sheets in the upper and while the formation in the center has the tlbers lying substantially in the machine direction.

White water drains through the faces of the molds 20 and 2| from the formation chambers |14 and v|15 and can again drain back through the faces of the molds at the bottomsv thereof into the vatk chamber, |60.l .This drained white water canbe removed from the vat through the drain pipe |6|.l In this 'arrangement the molds will run substantiallyv empty. Alternatively, of course, conventional drain outlets for the cylinder molds could be provided in the side walls of the valves inthe valved v the vats.

at atmospheric pressures, relying upon' vstoclrieed ypipes '|66a and pipe 'I 68'with the bottom chamber |14 a.2 Thus. the' pumps discharge into the' end of the top chamber Fibrous websformedon the cylinder-` molds l pass 'under slices |80 and `|8| provided on the formation chambers at'the tops of the compartments |14c and |15c cylinder mold rotates, 'therwebs are carried into the nips 34 and 35 where, they contact the felts 36 and 31. The webs and felts thenpass through the nips and the webs follow the felts around the couch rolls`32 and'33 through the common nip 52. lThe couch rolls 32 and 33 seal off a space 64 between the cylinder molds and end seals can be provided .to closeoi the ends of this space. The space caribe evacuated through a vacuum port 56, or, alternatively the molds can be run drainage for web formation.

From the above descriptions it will be understood that the invention provides for controlled handling of stock -to insure desired fiber formation in the paper produced by the machine, thereby eliminating one of the main objections of cylinder-type paper making machines, which generally produce sheets having theV fibers ly ing mainly in the machine direction. I claim: y

l. In a .paper lmaking machine including a the improvement which comprises means defining a plurality of adjacent vstock chambers communicating directly kwith said forming surface,` means for flowing the stock through spaced-chambers in opposite directions across the Width ofthe forming surface and in contact with said surface, and means for flowing stock directly toward and radially onto 'the forming surfacelirom a chamber between said spaced chambers.

' 2. In a. cylinder type paper. making machine including a rotating cylinder mold, the improvement which comprises three superimposed stock open ends directly communieating withV said cylinder mold, means for flowing stock in opposite directions through the top and bottom chambers along the entire length of the cylinder mold, and means for flowing stock respectively, and, -as the gravity through the middle chamber radially' onto said cylinder mold.

3. In a cylinder type paper making machina the improvement which comprises a head box having three superimposed chambers in direct communication with the cylinder mold along the length thereof, a header pipe having branch pipesv pipes on said header pipe,V n

width of the forming surface, depositing addi- 4. In a 'cylinder type paper making machine f including a pair of spaced opposed cylinder molds and means defining formation zones at nonadjacent sides of said cylinder molds, theimprovements which comprise partition walls separating said formation zones into superimposed compartments. means for fiowing stock in opposite directions through the top and bottom compartments along the lengths of the cylinder molds,

and means for flowing stock through the intermediate compartments radially onto said cylinder molds.

5. 'I'he method of making paper which comprises depositing stock onto a-,rotating cylinder mold from a first isolated stream flowing in one direction along the length of the mold, depositing additional stock onto said deposited stock from a second isolated stream flowing radially onto the cylinder mold,`depositing a top layer of stock onto the previously deposited layers from a` third isolated stream flowing along the length of the cylinder mold in a direction opposite to said first V mentioned stream, and damming oil stock flow between the streams along the mold to simultaneously control the thickness of the deposited stock layers on the mold. n

6. In a cylinder type paper making machine including aforming surface, the improvement which comprises means defining a plurality of adjacent stock chambers communicating with the forming surface, meansv for flowing stock third isolated chambers in opposite directions across the width of the forming surface, and means for flowing stock directly toward the forming surface from another of said chambers. l v f 8. In a cylinder type paper making machine, structure defining a localized formation zone on a portion of the cylinder mold of said machine,

. compartments in said localized formation zone,

means for flowing stock through one of s aid compartments parallel with thelength of the cylinder mold for deposit onto the mold from a stream flowing parallel with the mold, and means for flowing stock from another of. said compartments radially onto the mold.

9. The method of making paper which comprises depositing stock onto a forming surface from a first isolated stream flowing across the tional stock onto said deposited stock from a second isolated'stream `iiowing directly toward the forming surface, depositing a top layer of stock onto the previously deposited layer from a stream owing across the width of the forming surface in a direction opposite to said first mentioned stream, and slice-gauging the thickness of each stock layer deposited on the forming surface from each stream.

10. The method of making paper which comprises depositing stock onto a forming surface from a iirst isolated stream flowing in one direction across the width of the forming surface, depositing additional stock onto said deposited stock from a second isolated stream owing directly toward the forming surface, andV damming oifstock flow between the streams along the forming surface.

11. A head box for a paper making machine comprising means defining a stock chamber for extending across the width of a paper making machine, means -i'or feeding stock into the bottom of said chamber, said means having a passageway for connecting said chamber directly with the forming surface of a paper machine, and

through one of said chambers in a direction across the width of the forming surface and in communication with said surface, and means for flowing stock directly toward and onto the formi'ng surface from another of said chambers.

'1. In a paper making machine including a forming surface, the improvement whichccmprises means defining a plurality of stock chambers communicating with said forming surface, means for flowing stock' through some of said meansdeiining elongated compartments on opposite sides of said passageway for also communicating with said forming surface.

12. A paper machine` head box comprising a box, a header pipe extending along the lengthl of said box and communicating therewith for supplying stock thereto, said box having a first passageway for communicating directly with the forming surface of a paper machine, saidl box having compartments on opposite sides of said passageway for also communicating with said forming surface, and stock-propelling meins communicating with said header for flowing stock from said header in opposite directions along the lengths of said compartments.

WILMA E. BERRY, Eccentric: of the Estate of Earl E. Berry, De- 

